Media playback is unsupported on your device

Water voles fighting back in Sussex

19 April 2014 Last updated at 08:49 BST

The number of water voles has declined by a fifth in the UK since 2011, recent figures suggest.

Conservationists say the changeable weather and loss of habitat are among the reasons for the fall.

But in one small part of Sussex, the water vole is surviving as Roger Finn reports.

Copyright © 2015 BBC. The BBC is not responsible for the content of external sites. Read more.

This page is best viewed in an up-to-date web browser with style sheets (CSS) enabled. While you will be able to view the content of this page in your current browser, you will not be able to get the full visual experience. Please consider upgrading your browser software or enabling style sheets (CSS) if you are able to do so.